Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Methodology
The Bundelkhand region consists of thirteen districts: seven in Uttar Pradesh- Jhansi, Jalaun,
Lalitpur, Hamirpur, Mahoba, Banda and Chitrakoot, and six in Madhya Pradesh - Datia,
Tikamgarh, Chattarpur, Damoh, Sagar and Panna. This is situated just below the Indo-Gangetic
plain and is extending to the north with the undulating Vindhyan range spread across the
northwest to the south. It is situated between 23°20’ and 26°20’ N latitude and 78°20’ and
81°40’ E longitude. The daily gridded data (maximum temperature, minimum temperature,
mean temperature and rainfall) for the duration of 1990 to 2019 were obtained from India
Meteorological Department, Pune, India. Aridity index (AI) based on UNEP (1992) to quantify
the drought occurrence at each study location was used. This index was derived from two
important climatic elements for agriculture and reflects both the atmospheric supply (rainfall)
and atmospheric demand (evapotranspiration), i.e. two important factors affecting the water
budget of the land surface. The reference evapotranspiration (ETo) was calculated by using
temperature method given by Hargreaves and Samani (1985) and modified by Hargreaves et
al., (1985). As per the UNCCD definition, area which are sensitive to drought are
often divided into three categories, namely arid, semi-arid, dry sub-humid. If this index is less
than 0.5 then dry condition occurs in the area. Drought occurrences were examined based on
the frequencies of events for every drought category for all 13 districts coming under this
region. The percentage of drought occurrence was obtained by taking the ratio of drought
occurrences to the total drought occurrences for a particular time and particular drought
category as given by Sonmez et al., 2005. The drought occurrence probabilities were calculated
by using each drought event for all stations in each district in Bundelkhand region.
Results
In Banda district Chhatarpur and Chitrakoot districts, in most of the years in June, October and
in whole season, there was dry condition. In Chitrakoot district, there was more severe
condition and cases of hyper arid and arid condition were also more in comparison to these
other two districts. In the districts, Damoh, Datia and Hamirpur, Hamirpur was more affected
by dry conditions and there were more cases of hyper arid condition. In Datia also there were
more cases of dry condition but arid condition was more prevailing than hyper arid and no. of
cases were lesser than Datia. In Jalaun, Jhansi and Lalitpur, all the districts were affected by
dry condition mostly in June and October months. But in the whole season, the condition was
little bit better than individual months. In Jhansi district, dry condition was in more no. of years
in comparison to other two districts. In Mahoba, Panna and Sagar, Mahoba was more affected
than other two districts. Hyper arid to arid condition was more in June and October months in
comparison to other three months. In season, there was some dry condition but the condition
was better.
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